By VICTORIA WOOLLASTON FOR MAILONLINE
The origin of the mysterious bangs heard across the UK and New York at the weekend are yet to be officially identified.
But a leading theory is that they were created by an aircraft possibly travelling at supersonic or hypersonic speeds above the Atlantic.
This has led conspiracy theorists to attribute the booms to a spy plane rumoured to be under development by the US military, under the codename Aurora.
Within minutes, Twitter users had started spreading hashtags – from the straightforward #loudbangs to the somewhat melodramatic #omgwereallgoingtodie.
At around the same time, residents in locations including Buffalo, Cheektowaga, Clarence and as far north as Niagara Falls on the east coast of the US also took to social media to report the unusual noises.
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